我们正在尝试将 DHH 的简单 Rails 5 聊天示例部署到 AWS 上的单个自包含 EC2 实例。代码可在此处获得:https ://github.com/HectorPerez/chat-in-rails5
我们使用 Elastic Beanstalk 来启动单个实例,因此:
eb create dev-env -p “64bit Amazon Linux 2015.09 v2.0.4 running Ruby
2.2 (Puma)” –single -i t2.micro --envvars
SECRET_KEY_BASE=g5dh9cg614a37d4bdece9126b42d50d0ab8b2fc785daa1e0dac0383d6387f36b
这是一个最小的安装,所以没有 Elasticache,也没有负载均衡器。为了在 EC2 实例上安装 redis,我们添加了一个 .ebextensions 配置文件,如下所示:https://gist.github.com/KeithP/08b38189372b7fd241e5#file-ebextensions-redis-config;Git 提交和部署。
但是 websocket 不起作用:检查浏览器控制台,我们看到这个错误一遍又一遍地重复:
application-a57354de3399cd895ca366df9bd7316ab69e81d266b63be7d7be563ebc78ab9d.js:27
WebSocket connection to ‘ws://dev-env-y2e5dcrxqk.elasticbeanstalk.com/cable’ failed:
Error during WebSocket handshake: Unexpected response code: 404
服务器 production.log 为每个“Finished /cable”调用显示 2 个“Started GET /cable”。ActiveCable 没有 DEBUG 消息:
/var/app/containerfiles/logs/production.log
-------------------------------------
INFO -- : Processing by RoomsController#show as HTML
DEBUG -- : [1m[36mMessage Load (0.1ms)[0m [1m[34mSELECT "messages".* FROM "messages"[0m INFO -- : Rendered collection (0.0ms)
INFO -- : Rendered rooms/show.html.erb within layouts/application (0.5ms)
INFO -- : Completed 200 OK in 2ms (Views: 1.2ms | ActiveRecord: 0.1ms)
INFO -- : Started GET "/cable" for <ip_address> at 2016-01-01 17:28:26 +0000
INFO -- : Started GET "/cable/" for <ip_address> at 2016-01-01 17:28:26 +0000
INFO -- : Finished "/cable/" for <ip_address> at 2016-01-01 17:28:26 +0000